At least one person on board should be trained in first aid and know how to administer the contents of the first aiA medical emergency aboard a boat at sea requires immediate attention to ensure the safety of the casualty and the crew in general. The skipper needs to know which crew members, if any, have had medical training or have a first aid qualification. All boats should carry first aid handbooks to help an untrained crew cope with a medical emergency. d kit, ensuring there are adequate supplies for the planned duration of the trip.